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Attest

attestagents/install-attest-agent

Before your AI agent pays an unfamiliar endpoint using x402, L402, AP2, MPP, or HTTP 402, this server lets it scan the URL and get back a letter grade (A through F) plus a safety verdict. It exposes two tools: attest_scan for a full report with composite score, danger flags, and pricing, and attest_grade for a quick lookup on previously scanned hosts. The grading logic runs on Attest's servers, so you're installing a thin client that makes HTTPS calls and returns structured JSON. No API key required. Useful if you're building autonomous agents that need a programmatic trust check in their payment loop before authorizing a transaction.

tools
2
transport
STDIO, HTTP
env var
1
last updated
Jun 7, 2026
View on GitHub

Install

From registry metadata
$ npx add-mcp https://attestagent.org/api/mcp --name attest-mcp

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport http attest-mcp https://attestagent.org/api/mcp

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 2 tools

Verified live against the running server on Nov 6, 2026.

attest_scanScan an agent payment endpoint (x402 / HTTP 402) and return a letter grade A to F with a safety verdict before paying.1 params

Scan an agent payment endpoint (x402 / HTTP 402) and return a letter grade A to F with a safety verdict before paying.

Parameters* required
url*string
The endpoint URL to scan.
attest_guardVerify a live 402 payment offer at the moment of spend. Pass the EXACT offer you just received (url, payTo, amount, asset, network) and get an allow / warn / block verdict with machine-readable reasons: wallet mismatch vs the verified payout wallet, price swaps vs the last ver...6 params

Verify a live 402 payment offer at the moment of spend. Pass the EXACT offer you just received (url, payTo, amount, asset, network) and get an allow / warn / block verdict with machine-readable reasons: wallet mismatch vs the verified payout wallet, price swaps vs the last ver...

Parameters* required
amount*string
The offered amount in atomic units, as a string.
asset*string
Asset contract address or symbol from the offer.
network*string
Network / chain identifier from the offer (e.g. base, solana).
payTo*string
The payout address presented in the live 402 offer.
schemestring
Optional payment scheme (e.g. exact).
url*string
The endpoint URL you are about to pay.

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Configuration

ATTEST_BASE_URL

Override the Attest API base URL. Defaults to https://attestagent.org. Only needed for self-hosting or testing.

Readme

Attest MCP Server

npm version npm downloads License: MIT Node.js

Trust scanning for agent payments — right inside your AI agent.

attest-mcp is a Model Context Protocol server that lets any MCP-compatible agent (Claude, Cursor, Windsurf, VS Code, and more) scan an agent payment endpoint and get back a letter grade A–F with a clear safety verdict before authorizing a single cent.

It covers the agentic payment protocols in use today: x402, MPP, AP2, L402, and HTTP 402.

Powered by Attest. The scoring engine runs entirely on Attest's servers — this package is a thin client that relays requests, so installing it never exposes any proprietary grading logic.

Why

View the full README on GitHub

Details

Repository
github.com/attestagents/install-attest-agent
Website
attestagent.org
Categories
AI & LLM Tools, Finance & Commerce
Package
attest-mcp
Transport
STDIO, HTTP
Registry
MCP registry, active
Tools verified
Nov 6, 2026

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